Regulating device and method for manufacturing same

Abstract

A regulating device ( 1 ) for controlling the delivery flow in a motor-fuel injection pump is provided with a pump cylinder ( 2 ), a pump piston ( 3 ) with longitudinal groove and control edge, a piston foot ( 4 ) and an adjusting sleeve ( 5 ), the piston foot ( 4 ) being accommodated in the adjusting sleeve ( 5 ) in such a way that it is freely movable in axial direction. The adjusting sleeve ( 5 ) has an elongated thin-walled tubular profile ( 6 ), a regulating turning-lever plate ( 7 ) joined to the tubular profile ( 6 ), and a regulating turning lever ( 8 ).

What is claimed is:  
     
       1. A regulating device for controlling the delivery flow in a motor-fuel injection pump, comprising: 
       a pump cylinder having a cylindrical portion,  
       a pump piston disposed within the pump cylinder and having an inclined control edge and a piston foot, and  
       an adjusting sleeve having a tubular profile which embraces and guides the piston foot in the rotational direction while allowing free motion of the piston foot in the axial direction,  
       wherein the adjusting sleeve is formed with a constant cross section over its entire length and embraces the cylindrical portion of the pump cylinder while allowing axial displacement and rotational motion of said pump cylinder.  
     
     
       2. A regulating device according to claim  1 , further comprising a regulating turning-lever plate joined to the adjusting sleeve at an end facing the pump cylinder, which plate intimately embraces the pump cylinder in the circumferential direction in the manner of a partial circular arc. 
     
     
       3. A regulating device according to claim  1 , wherein the piston foot is adapted to make a plurality of line contacts with the adjusting sleeve. 
     
     
       4. A regulating device according to claim  1 , wherein the piston foot is adapted to make a plurality of point contacts with the adjusting sleeve ( 5 ). 
     
     
       5. A regulating device according to claim  1 , wherein the adjusting sleeve has a crimped tubular profile. 
     
     
       6. A regulating device according to claim  1 , wherein the piston foot further comprises a plurality of protruding convex structures adapted to make point contact with the adjusting sleeve. 
     
     
       7. A regulating device according to claim  2 , wherein the adjusting sleeve and regulating turning-lever plate are welded to one another. 
     
     
       8. A regulating device according to claim  2 , wherein the adjusting sleeve and regulating turning-lever plate are riveted to one another. 
     
     
       9. A regulating device according to claim  1 , wherein the adjusting sleeve further comprises an antifriction coating. 
     
     
       10. A regulating device in accordance with claim  1 , wherein the adjusting sleeve has a cruciate tubular profile. 
     
     
       11. A regulating device for controlling the delivery flow in a motor-fuel injection pump, comprising: 
       a pump cylinder having a cylindrical portion,  
       a pump piston movable within said pump cylinder, said pump piston having a piston foot,  
       an adjusting sleeve having a constant cross-section along its length, said adjusting sleeve embracing the cylindrical portion of the pump cylinder while allowing for axial and rotational movement of said pump cylinder, and said adjusting sleeve embracing and guiding the piston foot in the rotational direction while allowing for axial movement of said piston foot, and  
       a regulating turning-lever plate connected to the adjusting sleeve for rotation of the adjusting sleeve, said plate intimately embracing the pump cylinder in the circumferential direction.